The position of an object changes from r=(2i + j)m to r1=(4i + 3j)m in 2 sec .Find its average velocity?

Q. The position of an object changes from $\overrightarrow{r}=(2\hat{i}+\hat{j})m$ to $\overrightarrow{r}=(4\hat{i}+3\hat{j})m$ in $2s$. Find its average velocity.

Q. An object is displaced from position vector $r_1$=(2i+3j)m to $r_2$=(4i+6j)m under the action of a force F=(3$x^2$i+2yj)N. Finf the work done by this force.

Q. Velocity of a particle of mass 2 kg changes from $\overrightarrow{v_1}=-2\hat{i}-2\hat{j}m/s$ to $\overrightarrow{v_2}=(\hat{i}-\hat{j})m/s$ after colliding with a plane surface

Q. Velocity of particle of mass 2 kg change from $\overline{vi}=-\widehat{2i}-\widehat{2j}m/s$to$\overline{v2}=(\hat{i}-\hat{j})m/s$ after colliding with a plane surface.

Q. An object is moving with a velocity of 2 ms${}^{-1}$. Its velocity changes at a uniform rate to 5 ms${}^{-1}$. The average velocity of the object is